# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000067716-14-000029
Filing Date
2014-02-21
Accepted
2014-02-21 15:29:34
Documents
20
Period of Report
2013-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | mdu-12312013x10k.htm | 10-K | 4063032
2 | SECTION 16 OFFICERS AND DIRECTORS | mdu-12x31x13xex10l.htm | EX-10.L | 33593
3 | INSTRUMENT OF AMENDMENT TO THE RETIREMENT PLAN, DATED, DECEMBER 31, 2013 | mdu-12x31x13xex10aa.htm | EX-10.AA | 62720
4 | EMPLOYMENT LETTER FOR JEFFREY S. THIEDE, DATED MAY 16, 2013 | mdu-12x31x13xex10ab.htm | EX-10.AB | 37017
5 | COMPUTATION OF RATIO OF EARNINGS | mdu-123113xex12.htm | EX-12 | 71756
6 | SUBSIDIARIES OF MDU RESOURCES GROUP, INC. | mdu-12x31x13xex21.htm | EX-21 | 48418
7 | CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM | mdu-123113xex23a.htm | EX-23.A | 3130
8 | CONSENT OF RYDER SCOTT COMPANY, L.P. | mdu-123113xex23b.htm | EX-23.B | 10863
9 | CERTIFICATION OF CEO - SEC 302 SOX ACT 2002 | mdu-123113xex31a.htm | EX-31.A | 10460
10 | CERTIFICATION OF CFO - SEC 302 SOX ACT 2002 | mdu-123113xex31b.htm | EX-31.B | 10443
11 | CERTIFICATION OF CEO AND CFO - 18 USC SEC 1350 - SEC 906 SOX ACT 2002 | mdu-123113xex32.htm | EX-32 | 6860
12 | MINE SAFETY DISCLOSURES | mdu-123113xex95.htm | EX-95 | 190848
13 | RYDER SCOTT COMPANY, L.P. REPORT DATED JANUARY 27, 2014 | mdu-12x31x13xexx99a.htm | EX-99.A | 141712
14 | FIRST AMENDMENT TO EQUITY DISTRIBUTION AGREEMENT, DATED DECEMBER 2, 2013 | mdu-12x31x13xex99c.htm | EX-99.C | 30593
| Complete submission text file | 0000067716-14-000029.txt |  | 30960838

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
15 | XBRL INSTANCE DOCUMENT | mdu-20131231.xml | EX-101.INS | 5820314
16 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | mdu-20131231.xsd | EX-101.SCH | 143194
17 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | mdu-20131231_cal.xml | EX-101.CAL | 155185
18 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | mdu-20131231_def.xml | EX-101.DEF | 851166
19 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | mdu-20131231_lab.xml | EX-101.LAB | 1841684
20 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | mdu-20131231_pre.xml | EX-101.PRE | 1100563

Mailing Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503
Business Address 1200 WEST CENTURY AVENUE BISMARCK ND 58503 701-530-1059
MDU RESOURCES GROUP INC (Filer) CIK: 0000067716 (see all company filings)

EIN.: 410423660 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-03480 | Film No.: 14633339
SIC: 1400 Mining & Quarrying of Nonmetallic Minerals (No Fuels)